{"title":"High performance photonic ADC for space and defence applications","authors":"M. Piqueras, P. Villalba, J. Puche, J. Marti","doi":"10.1109/MWP.2013.6724081","DOIUrl":"https://doi.org/10.1109/MWP.2013.6724081","url":null,"abstract":"In the following lines it is presented the main needs of the next generation of ADCs for space and defence applications. A review of the state of the art of electronic ADCs will be presented with its main limitations of noise contributions, jitter and limited dynamic range with the frequency. A study of the different architectures of photonic ADCs that could solve the mentioned problems will be carried out summarizing the best results obtained so far. Finally, the Photonic ADC developed by DAS Photonics will be presented including the main obtained results and specifications table.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114672531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Svetlitza, S. Shapira, A. Unikovski, G. Peled, I. Brouk, Y. Nemirovsky
{"title":"CMOS DC to DC switched converter with on chip inductors","authors":"A. Svetlitza, S. Shapira, A. Unikovski, G. Peled, I. Brouk, Y. Nemirovsky","doi":"10.1109/ISPSD.2012.6229025","DOIUrl":"https://doi.org/10.1109/ISPSD.2012.6229025","url":null,"abstract":"In this study we report a monolithic buck converter power IC with on-chip ferrite core inductors. The power IC is designed and fabricated with a standard 0.18μm CMOS process. On-chip inductor with ferrite epoxy core is used as the filter inductor in the buck converter. A 5V/500mA prototype system in package (SiP) buck converter is designed to operate at frequencies up to 10MHz.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126912235","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Novel techniques to improve the GTEM chamber performance by applying metamaterial concepts on the excitation sector: The APEX characterization","authors":"H. X. Araujo, S. Barbin, L. Kretly","doi":"10.1109/COMCAS.2011.6105877","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105877","url":null,"abstract":"In this work it is presented the analysis and characterization of different types of metamaterial patterns, such as fractal cells, Jerusalem-Cross-Pair, SRR — Split Ring Resonator and CSRR — Complementary Split Ring Resonator printed on the septum of a GTEM chamber. The main goal is to improve the chamber overall performance and to optimize it in terms of frequency for the electromagnetic compatibility analysis of integrated circuits and electronic boards. Experimental results are compared to simulated ones showing the advantages of the tuned characteristic of the patterned septum in comparison to the conventional type. This technique appears as an option for the performance optimizations of compact GTEM chambers.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126098356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Zalevsky, S. Avraham, Moshe Haning, S. Zach, M. Tur
{"title":"Construction of photonic rotman-lens module for radar phased array antennas","authors":"Z. Zalevsky, S. Avraham, Moshe Haning, S. Zach, M. Tur","doi":"10.1109/COMCAS.2011.6105816","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105816","url":null,"abstract":"In this paper we report for the first time the construction and the experimental characterization of a novel microwave photonic implementation of a Rotman-lens that eventually offers improved performance for Radar phased array antennas. The proposed scanning unit is an optical module, where photo-detectors connected to the transmitting/receiving antennas are the interfaces, converting between the RF signals and their respective optical waves. In addition to the improvement that is obtained by realizing the solution in photonics, the proposed improved design for the photonic Rotman lens realizes a linear phase profile with a varied slope, that is obtained at the output of the lens for any possible position at the input to the lens. This is in contrast to what is currently available with the conventional RF Rotman lens, where output phase front linearity is obtained for a small and discrete number of input positions.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123436499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Designing and building of a circular GPS antenna","authors":"O. Abraham, A. Leib, H. Matzner","doi":"10.1109/COMCAS.2011.6105835","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105835","url":null,"abstract":"A circularly polarized microstrip antenna for global positioning system aims is proposed. This work presents the design of a dual-feed patch, which operates at single band (L1) of 1575 MHz. Circular polarization is achieved directly by the dual-feeding technique of a square patch through microstrip lines. The geometrical emplacement of the lines and the feeding point had been chosen in such a matter for the generated waves to be ninety degrees out of phase. The antenna is matched for 50 ohm input impedance, with 1.3% matching bandwidth and 0.63% right-hand circular polarization bandwidth. Good agreement between simulation and measurement was achieved.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122483264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Applying method of moments based on expansion functions defined in the infinite domain","authors":"D. Malka, Z. Ibragimov, H. Matzner","doi":"10.1109/COMCAS.2011.6105920","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105920","url":null,"abstract":"The method of moments (MoM) based on expanding the fields outside the body is discussed. Two problems are presented: the thin charged disk and the center-fed disk antenna. It is shown that when the expansion functions exactly obey the physical behavior of the fields near the edge of the body and at infinity, excellent convergence is obtained.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114165472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Kapilevich, Y. Pinhasi, M. Anisimov, B. Litvak, D. Hardon, Y. Wool
{"title":"Detecting power lines using 330GHz FMCW sensor","authors":"B. Kapilevich, Y. Pinhasi, M. Anisimov, B. Litvak, D. Hardon, Y. Wool","doi":"10.1109/COMCAS.2011.6105768","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105768","url":null,"abstract":"330 GHz sensor is developed for detecting power lines along the traffic of low altitude flying aircrafts. It is based on a frequency modulated continuous wave (FMCW) mode of operation and includes the two high gain horn-lens antennas integrated with a homodyne transceiver. The FMCW signal at X-band is multiplied by a factor of 32 to generate the transmitted signal. An intermediate frequency (IF) signal obtained in the output port of the 2-nd harmonic mixer is employed for processing. Power line detection was done by data acquisition unit based on LabView interface and resulting in a range resolution about 5cm. Experiments carried out with real-world power lines have demonstrated an applicability of sub-mm wave range for improving flight safety conditions of such aircrafts.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114297662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Coupled structural-electromagnetic modeling and analysis of offset reflector antennas","authors":"H. J. Xu, C. S. Wang, J. Huang, Z. Zhang, Z. Lei","doi":"10.1109/COMCAS.2011.6105910","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105910","url":null,"abstract":"With the development of offset reflector antennas with high performance, the growing demands for high frequency, low sidelobe level and reduced mass have brought structural design and manufacturing process stringent requirements. The coupled structural-electromagnetic problem of offset reflector antennas is studied to find out the prime structural factors which have a great effect on electromagnetic performances, thereby reducing the requirements of minor structural factors effectively. Considering the structural factors such as the reflector surface errors and the feed errors, the coupled structural-electromagnetic model of the offset reflector antenna is discussed and developed by using the aperture field method. The coupled analysis results of the electromagnetic performance of a 2.6-m spaceborne offset antenna with surface thermal distortions caused by solar radiation shows the proposed coupled model is effective and of potential engineering value.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129566911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Quijano, G. Vecchi, M. Sabbadini, L. Scialacqua, B. Bencivenga, F. Saccardi, L. Foged
{"title":"Source reconstruction as a diagnostics tool in advanced antenna measurements","authors":"J. Quijano, G. Vecchi, M. Sabbadini, L. Scialacqua, B. Bencivenga, F. Saccardi, L. Foged","doi":"10.1109/COMCAS.2011.6105937","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105937","url":null,"abstract":"Recently, a growing research effort has been aimed at the problem of reconstructing the extreme near field radiated by the antenna from measured field data. Inverse source or the equivalent current/source method (EQC) based on discretization of integral equations has attracted considerable attention due to a host of promising applications in antenna design and diagnostics [1]–[8]. The integral equation approach constitutes a complement to more established tools such as plane-wave or spherical-wave expansion. At the expense of heavier computational burden this method offers a greater generality and flexibility since it allows reconstructing sources on any arbitrary 3-D surfaces enclosing the antenna under test (AUT). In [8] a unified EQC formulation was presented, in which the Equivalence Theorem is used to determine the set of equivalent electric and magnetic sources fully representing the fields on the reconstruction surface. This allows the extreme near field to be reconstructed from measured field data. The spatial filtering properties of the new EQC formulation was reported in [9]-[10] in which the method was shown to be efficient at eliminating radiation contributions from unwanted sources such as scattering from cables and support structures. In this work we examine the application of the EQC method as a diagnostics tool in practical measurement situations on different antennas recently reported in the literature [11]-[12]. An investigation of the level of details obtainable in practical measurement situations is also reported","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130472896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Komoshvili, J. Levitan, S. Aronov, B. Kapilevich, A. Yahalom
{"title":"Millimeter waves non-thermal effect on human lung cancer cells","authors":"K. Komoshvili, J. Levitan, S. Aronov, B. Kapilevich, A. Yahalom","doi":"10.1109/COMCAS.2011.6105865","DOIUrl":"https://doi.org/10.1109/COMCAS.2011.6105865","url":null,"abstract":"Preliminary investigation of human lung cancer cells' interaction with millimeter wavelength electromagnetic waves was carried out. The irradiation was performed in vitro by sweeping in frequency in the range 75–110 GHz (W-band), for different exposition times. Frequency spectra of the reflected signal were analyzed and compared for different exposure times. Also, a statistical analysis of the cell populations obtained by microscope imaging was performed. The following effects were observed: 1) retraction of the mean size of the population under irradiation; 2) appearance of the population of large cells (“monsters”); 3) formation of multi-nuclear (polyploidy) cells; 4) dependence of power absorption on the exposition time.","PeriodicalId":122226,"journal":{"name":"2011 IEEE International Conference on Microwaves, Communications, Antennas and Electronic Systems (COMCAS 2011)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130635206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}